Expression. Every atom of the body, the eyes which see and the hand which holds the brush, are obedient servants of the mind. When an artist produces a picture on the canvas at a time when his body is not in perfect submission to his mind, and his mind not completely disciplined by his spirit, he cannot produce the picture to his satisfaction. His mind must be respondent to the guiding voice of his soul, and his hand must be led aright by the power of his mind. It is necessary that the hand of the painter is well-practiced in order to act rightly according to the suggestion of the mind. If the hand is not trained enough, the mind is not satisfied. It is necessary that the material in the way of brush and color and canvas is all up to the choice of the painter to the best of his satisfaction. It is necessary that the surroundings of the artist are congenial and at least harmonious if not inspiring. But artistic environments, harmonious atmosphere, and beautiful surroundings are helpful.